Hi, not sure if you have sorted this. I found your thread when trying to sort mine. I first checked mine with a ECU kit I knew worked. Still couldnt get the ethos to connect to the ECU. So then hunted around the fuse box (should of done this first) and found a small grey wire broken. Connected it back together and sure enough it was fixed. The only reason anyone has been behind the fuse box was to fit a immobiliser thats when it must have got broken.